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Assertion: Through large number of free...

Assertion: Through large number of free electron are present in the metal, yet there is no current in the absent of electric field.
Reason: In the absence of electric field, electrons move remdomly in all directions

A

if both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C

if Assertion is true, but the Reason is false.

D

if both Assertion and Reason are false

Text Solution

Verified by Experts

The correct Answer is:
b
Free electrons present in the metal are moving randomly in all directions in of electric field. Hence, the average velocity of electrons is zero. Because of it the current does not flow in the metal in the absence of electric field.
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Knowledge Check

  • Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron are randomly.

    A
    If both assertion and reason are ture and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If assertion and reason both are false.

  • The average velocity of electrons in a conductor in the absence of electric field is

    A
    `10^(2)`m/s
    B
    `10^(-2)`m/s
    C
    `10^(4)` m/s
    D
    `10^(-4)` m/s

  • Assertion (A): There is no current in the metals in the absence of an electric field. Reason (R) : Motion of free electrons are randomly directed in the absence of an electric field.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If the assertion is false but reason is true.

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